h = eval(input("输入身高"))
w = eval(input("输入体重(kg)"))
BMI = w/(h ^ 2)
print(BMI)
if BMI < 18.5:
    print("过轻")
elif 18.5 <BMI <25:
    print("正常")
elif 25 <BMI <28:
    print("过重")
elif 28 <BMI <32:
    print("正常")
elif 32 <BMI:
    print("正常")